package servlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

@WebServlet("/PictureServerRelative")
public class PictureServerRelative extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    public PictureServerRelative() {
        super();
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  
    	  String url = request.getSession().getServletContext().getRealPath("/");//项目路劲
          System.out.println("url:"+ url);
    	request.setCharacterEncoding("utf-8");  
        response.setCharacterEncoding("utf-8");  
        //1、创建一个DiskFileItemFactory工厂  
        DiskFileItemFactory factory = new DiskFileItemFactory();  
        //2、创建一个文件上传解析器  
        ServletFileUpload upload = new ServletFileUpload(factory);  
        //解决上传文件名的中文乱码  
        upload.setHeaderEncoding("UTF-8");   
        factory.setSizeThreshold(1024 * 500);//设置内存的临界值为500K  
        File linshi = new File(url+"WEB-INF/upload/");//当超过500K的时候，存到一个临时文件夹中  
        factory.setRepository(linshi);  
        upload.setSizeMax(1024 * 1024 * 5);//设置上传的文件总的大小不能超过5M  
        try {  
            // 1. 得到 FileItem 的集合 items  
            List<FileItem> /* FileItem */items = upload.parseRequest(request);  
  
            // 2. 遍历 items:  
            for (FileItem item : items) {  
                // 若是一个一般的表单域, 打印信息  
                if (item.isFormField()) {  	
                    String name = item.getFieldName();  
                    String value = item.getString("utf-8");  
  
                    System.out.println(name + ": " + value);  
                    
                }  
                // 若是文件域则把文件保存到picture 目录下.  
                else {  
                    String fileName = item.getName();  
                    long sizeInBytes = item.getSize();  
                    System.out.println(fileName);  
                    System.out.println(sizeInBytes);  
  
                    InputStream in = item.getInputStream();  
                    byte[] buffer = new byte[1024];  
                    int len = 0;  
  
                    String refileName = url+"WEB-INF/upload/" + fileName;//文件最终上传的位置  
                    
                    System.out.println(refileName);  
//                   String  pathtwo = "C:\\Users\\Administrator\\git\\DemoPictureDispose2\\PictureUp\\WebContent\\upload\\"+fileName;
                    OutputStream out = new FileOutputStream(refileName);  
//                    OutputStream realout = new FileOutputStream(pathtwo);  
  
                    while ((len = in.read(buffer)) != -1) {  
                        out.write(buffer, 0, len);  
//                        realout.write(buffer, 0, len);  
                    }  
                    out.close();
//                    realout.close();
                    
                    in.close();  
                }  
            }  
  
        } catch (FileUploadException e) {  
            e.printStackTrace();  
        }  
  
    }  
}
